| 杨 洋,张 苏,宋华庭,卢仁红.水泥分解炉富氧燃烧的数值模拟研究[J].水泥工程,2025,38(2):12-17 |
| 水泥分解炉富氧燃烧的数值模拟研究 |
| Numerical simulation study on oxygen-enriched combustion in cement calciner |
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| DOI： |
| 中文关键词: 富氧燃烧 煤粉燃烧 节能减排 CPFD 数值模拟 |
| 英文关键词: oxygen-enriched combustion coal combustion energy conservation and emission reduction CPFD numerical simulation |
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| 摘要点击次数: 14 |
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| 中文摘要: |
| 本研究运用计算颗粒流体力学（CPFD）方法开展数值模拟，深入探究了在送煤风和三次风分别为空气与富氧气体、燃料为烟煤和无烟煤时，水泥分解炉的运行特性。通过对不同工况下分解炉内温度场以及烟气组分浓度分布等关键参数的细致对比分析，全面剖析了富氧燃烧模式对分解炉流场产生的影响。研究结果显示：在富氧环境下燃烧燃料时，分解炉内温度场依然保持相对均匀，氧气浓度的提升有力地促进了煤粉的充分燃烧，进而提高了燃烧效率；富氧燃烧技术的应用能够显著改善分解炉内劣质煤的燃烧特性，有助于在实际生产中提高无烟煤的利用率；此外，富氧气氛条件下，煤粉挥发分析出加快，形成碳氢化合物富集区还原已生成的NOx，可降低NOx排放量。 |
| 英文摘要: |
| This study employs numerical simulation based on the Computational Particle Fluid Dynamics (CPFD) method to thoroughly investigate the combustion characteristics of bituminous coal and anthracite in a cement calciner when the coal-feeding air and tertiary air are respectively usual air and oxygen-enriched gas. By meticulously comparing key parameters such as the temperature field and flue gas component concentration distribution in the calciner under different conditions, the influence of the oxygen-enriched combustion on the flow field in calciner is comprehensively analyzed. The research findings reveal that when fuel is combusted in an oxygen-enriched atmosphere, the temperature field in the calciner remains relatively uniform. The increased oxygen concentration effectively promotes the complete combustion of pulverized coal, thereby enhancing combustion efficiency. The application of oxygen-enriched combustion technology can significantly improve the combustion characteristics of inferior coal in the calciner and increase the utilization rate of anthracite in practical production. Additionally, under oxygen-enriched conditions, the faster release of volatile matter from pulverized coal forms a hydrocarbon-rich zone that reduces the total NOx emissions by partially reducing the already generated NOx. |
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